
Land Rover Discovery P400e Engine Rebuild - From £2,800
Specialist Land Rover Discovery P400e engine rebuilds and replacements, with registration-based engine matching, nationwide recovery and a 12-month unlimited-mileage warranty
Rated Land Rover Engine Specialists - 1,800+ Engines Rebuilt
Specialist technicians with 10-15 years of experience
12 Month Unlimited-Mileage Warranty
Nationwide Recovery
Free Engine Matching by Registration
Ingenium Ingenium AJ300P Specialists
Your Land Rover Discovery P400e Engine

Vehicle
Land Rover Discovery P400e
Model
Discovery
Variant
Discovery P400e
Fuel
Petrol PHEV
Engine
Ingenium AJ300P
Capacity
3.0L I6
Generations
D5/L462 (2017-present)
Rebuild From
£2,800
Not sure which engine you have?
The Discovery P400e uses the Ingenium AJ300P 3.0-litre inline-six mild-hybrid engine - enter your registration below and we'll confirm your exact spec before you get a quote.
DVLA & VIN verified
100% secure & private
No obligation quote
Land Rover Discovery P400e Engine Rebuild Price
Starting From £2,800

Engine Code
Ingenium AJ300PRebuild From
£2,800

Generation
D5/L462 (2017-present)
Exact price depends on condition and parts required - submit your reg for a fixed-price quote.
Land Rover Discovery P400e Known Issues by Engine
If your Discovery P400e has the Ingenium AJ300P (L663 generation):
Timing chain wear - Ingenium diesel engines share a well-documented timing chain pattern. We replace timing chains, guides and tensioners as standard on every Ingenium AJ300P rebuild.
Source: established specialist consensus, l663.guide specialist buying guide, what-breaks.com. This applies to L663 Defenders only - not to classic Defender models

Land Rover Discovery P400e ENGINE OPTIONS
Every Discovery P400e is different. That's why we offer the right solution for your engine, your car and your budget.
NOT SURE WHICH OPTION IS RIGHT FOR YOU?
Enter your registration below and we'll confirm your Ingenium AJ300P and talk you through the best solution for your Discovery P400e, honestly.
Ask About Your OptionsOUR WORKSHOP
01RECOVERY COLLECTION

02Ingenium AJ300P ENGINE STRIPPED FOR REBUILD INSPECTION

03VALVE COVERS & COOLANT COMPONENT WORK
04TECHNICIANS AT WORK
05ENGINE TESTING (RIG)
06COMPLETED & READY FOR REFIT
Real photos from our workshop - not stock imagery. This is what a genuine Land Rover Discovery P400e rebuild looks like.
Land Rover Discovery P400e ENGINE REBUILD PROCESS
WE COVER YOUR EXACT VEHICLE
Enter your registration below and we'll confirm your Land Rover Discovery P400e has the Ingenium AJ300P, along with an exact rebuild price.
WHY LAND ROVER Discovery P400e OWNERS CHOOSE US
Engine matched using VIN or registration number
Genuine specialist workshop - not a broker
Specialist technicians with 10-15 years of experience
We don't swap your engine for an unknown used unit
Nationwide recovery, workshop rebuild
12 month unlimited-mileage warranty
All engine ancillaries serviced as part of the rebuild
Trade & public enquiries welcome
Dedicated advisor from quote to fit
OUR MOST RECENT LAND ROVER RECOVERIES & REBUILDS
Real vehicles brought into our workshop. Open bonnets, stripped blocks, and cars ready for collection - this is what genuine engine work looks like.

Land Rover Discovery P400e
RECOVERY

Land Rover Discovery P400e
DIAGNOSTICS

Land Rover Discovery P400e
STRIPPED ENGINE

Land Rover Discovery P400e
TIMING CHAIN REPLACEMENT

Land Rover Discovery P400e
IN FOR REBUILD

Land Rover Discovery P400e
REBUILD IN PROGRESS
HOW IT WORKS
SEND YOURREGISTRATION
RECEIVE YOURFIXED-PRICE QUOTE
WE RECOVERYOUR CAR
REBUILD &REFIT
Most Defender models are recovered within a few hours of booking. Most rebuilds are completed within 3-5 working days.
Workshop slots fill up fast - book your recovery today.
LOOKING FOR A USED OR REPLACEMENT ENGINE INSTEAD?
We supply low-mileage, VIN-matched used units too, and offer full replacement and fitting. However, most Discovery P400e owners choose a rebuild once they realise it removes compatibility risk and works out more cost-effective over the life of the car. Enter your reg below and we'll show you every option, honestly.
ABOUT THE Land Rover Discovery P400e ENGINE

The Discovery P400e is a plug-in hybrid variant of the current D5 generation, introduced in 2017. It uses the Ingenium AJ300P - a 3.0-litre inline-six petrol engine paired with an electric motor and battery. It is one of the few petrol options in the Discovery range, sitting alongside the diesel D250/D300/D350 and the petrol P360/P400. The P400e's powertrain is shared with other JLR models, and its petrol engine is known to be generally more reliable than its diesel Ingenium counterparts.
We continue to rebuild and replace Ingenium AJ300P engines for every Discovery P400e on the road.
Land Rover Discovery P400e ENGINE CODES
A 3.0-litre inline-six petrol fitted to the Discovery P400e from 2017 to present (D5/L462). This is the petrol PHEV engine for the Discovery range. There are no widely-reported known issues specifically for this engine in this application.
Check Your Ingenium AJ300P Discovery P400eLand Rover Discovery P400e ENGINE COMPATIBILITY

Because the Discovery D5 shares the same AJ300P engine with other variants like the P400, and the range also uses different engines for diesel models (AJ300D) and the P360, it's critical to confirm your exact engine code before any work is carried out. Sourcing the wrong engine or assuming the same parts fit across the range can lead to compatibility issues. We always start with your registration to verify your Discovery P400e's exact engine code.
Your exact engine code (Ingenium AJ300P) via registration or VIN
Your generation (L663)
Drivetrain and ancillary specification
Whether your build falls in the early production period (2019-2020) for injector fault coverage
This is why we always start with your registration rather than a generic Defender quote - it protects you from paying for parts that don't fit your actual car.
Land Rover Discovery P400e APPLICATIONS BY GENERATION
Land Rover Discovery P400e ENGINES BY YEAR
Land Rover Discovery P400e has used the Ingenium AJ300P throughout. If you're unsure of your exact spec, we'll confirm it before you book.
The Ingenium AJ300P has been fitted to every Discovery P400e since launch - if your registration year isn't listed above, get in touch and we'll confirm availability directly against your reg.
WE COVER EVERY Land Rover Discovery P400e MODEL YEAR:
Land Rover Discovery P400e
2017 Engine Rebuild
Land Rover Discovery P400e
2018 Engine Rebuild
Land Rover Discovery P400e
2019 Engine Rebuild
Land Rover Discovery P400e
2020 Engine Rebuild
Land Rover Discovery P400e
2021 Engine Rebuild
Land Rover Discovery P400e
2022 Engine Rebuild
Land Rover Discovery P400e
2023 Engine Rebuild
Land Rover Discovery P400e
2024 Engine Rebuild
Land Rover Discovery P400e
2025 Engine Rebuild
Land Rover Discovery P400e
2026 Engine Rebuild
If your registration year or model isn't listed above, get in touch - we'll confirm availability directly against your reg.
Land Rover Discovery P400e ENGINE COSTS
A Land Rover Discovery P400e engine rebuild starts from
£2,800
A full replacement engine and fitting service is also available. Exact pricing depends on the condition of your existing engine and the parts required - submit your registration for a fixed-price quote within 30 minutes.

12 MONTH
UNLIMITED-MILEAGE
WARRANTY
LAND ROVER Discovery P400e ENGINE SIZES
• Land Rover Discovery P400e 3.0 Litre Engine (Ingenium AJ300P, I6)
LAND ROVER Discovery P400e FUEL TYPES
• Land Rover Discovery P400e Petrol Mild Hybrid Engine Rebuilds
Related Land Rover Discovery Variants
Most Land Rover Discovery P400e engine rebuilds are completed within 3-5 working days.
Nationwide recovery and collection available for all Land Rover Discovery P400e models.












